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Finding the Fourth Proportional to 18,055.98, 24,916.78 and 9,989.92

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Solution

The fourth proportional to 18,055.98, 24,916.78 and 9,989.92 is: 13,785.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,055.98 : 24,916.78 = 9,989.92 : x
  2. Step 2: Convert to fraction form
    18,055.98/24,916.78 = 9,989.92/x
  3. Step 3: Cross multiply
    18,055.98x = 24,916.78 × 9,989.92
  4. Step 4: Simplify right side
    18,055.98x = 248,916,638.86
  5. Step 5: Solve for x
    x = 248,916,638.86/18,055.98
  6. Step 6: Final answer
    x = 13,785.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.